mavpicviewer: use definitions for colours

MAVProxy/tools/mavpicviewer/mavpicviewer_image.py

@@ -336,7 +336,7 @@ def update_image(self):
         # add POI rectangles to image
         if self.filenumber in self.poi_dict.keys():
             poi = self.poi_dict.get(self.filenumber)
-            cv2.rectangle(image, (poi.pos1.X, poi.pos1.Y), (poi.pos2.X, poi.pos2.Y), (255, 0, 0), 2)
+            cv2.rectangle(image, (poi.pos1.X, poi.pos1.Y), (poi.pos2.X, poi.pos2.Y), mpv.RGB_RED, 2)
 
         # load exif data
         self.lat, self.lon, self.alt_amsl, self.terr_alt, \
@@ -392,15 +392,15 @@ def update_map(self):
 
         projection1 = self.cam1_projection.get_projection(self.lat, self.lon, self.alt_amsl, self.roll, self.pitch, self.yaw)
         if projection1 is not None and self.sm is not None:
-            self.sm.add_object(mp_slipmap.SlipPolygon('projection1', projection1, layer=1, linewidth=2, colour=(0, 255, 0)))
+            self.sm.add_object(mp_slipmap.SlipPolygon('projection1', projection1, layer=1, linewidth=2, colour=mpv.RGB_GREEN))
         else:
             print(prefix_str + "failed to add projection to map")
 
     # add a rectangle specified by two locations to the map
     def add_rectangle_to_map(self, name, lat1, lon1, lat2, lon2):
         if self.sm is not None:
             rect = [(lat1, lon1), (lat1, lon2), (lat2, lon2), (lat2, lon1), (lat1, lon1)]
-            self.sm.add_object(mp_slipmap.SlipPolygon(name, rect, layer=1, linewidth=2, colour=(255, 0, 0)))
+            self.sm.add_object(mp_slipmap.SlipPolygon(name, rect, layer=1, linewidth=2, colour=mpv.RGB_RED))
 
     # remove a rectangle from the map
     def remove_rectangle_from_map(self, name):